forked from Minki/linux
9c5f69bbd7
use RCU instead of spin_{,unlock}_bh() to protect concurrent read/write on
act_csum configuration, to reduce the effects of contention in the data
path when multiple readers are present.
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
43 lines
814 B
C
43 lines
814 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __NET_TC_CSUM_H
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#define __NET_TC_CSUM_H
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#include <linux/types.h>
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#include <net/act_api.h>
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#include <linux/tc_act/tc_csum.h>
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struct tcf_csum_params {
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int action;
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u32 update_flags;
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struct rcu_head rcu;
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};
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struct tcf_csum {
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struct tc_action common;
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struct tcf_csum_params __rcu *params;
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};
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#define to_tcf_csum(a) ((struct tcf_csum *)a)
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static inline bool is_tcf_csum(const struct tc_action *a)
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{
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#ifdef CONFIG_NET_CLS_ACT
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if (a->ops && a->ops->type == TCA_ACT_CSUM)
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return true;
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#endif
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return false;
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}
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static inline u32 tcf_csum_update_flags(const struct tc_action *a)
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{
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u32 update_flags;
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rcu_read_lock();
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update_flags = rcu_dereference(to_tcf_csum(a)->params)->update_flags;
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rcu_read_unlock();
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return update_flags;
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}
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#endif /* __NET_TC_CSUM_H */
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